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N0. 6|2,933. Patented Oct. 25, I898.

.1 s ROGERS.

STEAM BOILER.

( Application filed Feb. 3, 1898.)

(No Model.)

INVENTOR: J ,ffloyem".

ATTORNEY WITNESSES:

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UNIT D STATES PATENT OFFICE.

J S ROGERS, OF NEW YORK, N. Y.

STVEAM -BOlLER.

SPECIFICATION forming part of Letters Patent No. 612,933, dated October 25, 1898.

Application filed February 3, 1898. Serial No. 669,009. (No model.)

T0 to whom it may concern:

Be it known that I, J S ROGERS, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Steam-Boilers, of which the following is a specification.

By means of this invention generated steam can be allowed to mingle with the products of combustion or thoroughly heated or superheated steam can be generated, as set forth in the following specification and claims and illustrated in the annexed drawing, which shows a sectional elevation of a boiler.

The boiler 1 may be of any suitable known construction. In the drawing is shown a boiler with tubes 2. A combustion-chamber 3 can be suitably fed, as by gas or a combustible, from tube 4, mingled with air from tube 5. The flame or heat passing through tubes 2 below the water-line in the boiler heats the water in the latter or generates steam, which rises into dome 6 or can be drawn ofi through tubes 7 and 8 to the point of consumption or work. From tubes 2 the heat or flame or products of combustion pass through chamber 9 to tube 10, leading to tube 8. As the products of combustion are allowed to mingle with greater or less intensity with the steam which has been generated and which has passed into pipe 8, such steam is suitably heated or superheated or dried. The steam and products of combustion passing together along pipe 8 can be led to the point of use or made to work as required.

The chamber 3 can have the combustible The combustion-chamber is shown common to all the tubes 2; but of course the chamber 3 could be subdivided or a series of combustion-chambers provided, each such chamber taking only a group or subdivision of tubes 2. According as one or more combustionchambers are then in action the generation of steam will be varied as required, or the boiler if not in action could be kept moderately heated to be able to get to work at short notice when required.

The steam-outlet pipe 7 and flue-pipe 10 are shown with valves or cocks 11 and 12.

The combustion-chamber can of course be suitably located or put bodily into the boiler, if required.

In case the products of combustion are not to be allowed to enter tube 8 the valve 12 can be closed and the products allowed to escape through tube 13 on opening valve 14.

vVVhat I claim as new, and desire to secure by Letters Patent, is

1. The combination with a boiler having a steam-exit pipe, and the combustion-chamber, of a flue arranged to convey the heat and products of combustion from the boiler directly to the steam-exit pipe, substantially as described.

2. The combination with a fire-tube steamboiler having a steam-exit pipe, of a combustion-chamber communicating with one end of the fire-tubes, and a flue leading from the other end of said fire-tubes directly to the steam-exit pipe, whereby the furnace-gases are intermingled in a highly-heated state with the generated steam, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

J S ROGERS.

Witnesses:

W. O. I-IAUFF, E. F. KASTENHUBER. 

